CN206114884U - Arrester counter calibration equipment - Google Patents
Arrester counter calibration equipment Download PDFInfo
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- CN206114884U CN206114884U CN201621121660.6U CN201621121660U CN206114884U CN 206114884 U CN206114884 U CN 206114884U CN 201621121660 U CN201621121660 U CN 201621121660U CN 206114884 U CN206114884 U CN 206114884U
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- 238000012360 testing method Methods 0.000 claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims abstract description 17
- 238000004146 energy storage Methods 0.000 claims abstract description 17
- 238000007600 charging Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract 3
- 239000002131 composite material Substances 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 230000009471 action Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000012795 verification Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 229960001296 zinc oxide Drugs 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
Arrester counter's calibration equipment, it mainly includes makes up ripples generating circuit and power current production circuit, combination ripples generating circuit include mainly that direct current high voltage power, combination ripples take place the return circuit, the high frequency boost power supply of direct current high voltage power connects one through the charging resistor and is used for the high -pressure energy -storage capacitor that charges, passes through the control circuit that resistance voltage divider connects real -time supervision electric capacity both ends magnitude of voltage at high -pressure energy -storage capacitor both ends, and connect and take place the return circuit at the combination ripples of high -pressure energy -storage capacitor both sides and mainly establish ties and constitutes by high -pressure discharge switch and resistance, inductance, should make up ripples generating circuit and connect in the both ends by the article of examination and rogowski coil current circuit, the high -pressure discharge switch be controlled by control circuit, and charge when reaching the predetermined value at high -pressure energy -storage capacitor, control circuit stops the electric capacity post -trigger high -pressure discharge switch closure that charges, and at quilt examination article both ends output voltage impulse, output impulse current ripples on rogowski coil, power current produces the circuit and mainly includes a singlechip, this singlechip connection frequency conversion module, by frequency conversion module connects in the both ends of arrester monitor to in the adjustable power frequency voltage of the amplitude joining test loop who produces.
Description
Technical field
The utility model relates to a kind of counter of lightning arrester calibration equipment, belongs to spark gap calibration technology field.
Background technology
In power transmission and transforming equipment, spark gap is main equipment costly, and the effect of spark gap is for protecting electric power
The electricity that various electric equipments impact and damage from lightning surge, switching overvoltage, Frequency Transient Overvoltage in system
Device.The type of spark gap mainly has portable protective gaps, valve-type arrester and Zinc-Oxide Arrester.Portable protective gaps are mainly used in limiting big
Gas overvoltage, is generally used for the protection of distribution system, circuit and inlet wire of substation section.Valve-type arrester is used for Zinc-Oxide Arrester
Electric substation and the protection in power plant, are mainly used in limiting atmospheric over-voltage, in 500kV and following system in extra high voltage system also
To be used for limiting internal overvoltage or make the back-up protection of internal overvoltage.
In prior art, arrester discharge counter and lightning arrester monitor are in transformer substation arrester real time on-line monitoring
It is used widely, is that the performance for monitoring spark gap plays an important role.Arrester discharge counter and lightning arrester monitor rise
Monitoring leakage current of an arrester and the effect as number of lightning strokes statistics.In being serially connected in arrester ground loop, in monitor
Milliammeter be used to monitoring under working voltage that (the monitor record of some producers to be leakage by the leakage current virtual value of spark gap
Current peak), it can be determined that whether make moist inside spark gap, situations such as whether element is abnormal, so as to effectively find to keep away ahead of time
Thunder device internal flaw, it is to avoid the generation of accident in operation.Operation counter then be record spark gap under overvoltage action time
Number, if spark gap frequent movement under overvoltage, easily causes insulation ag(e)ing and leakage current increase to cause zinc oxide valve plate to be sent out
Hot the problems such as, if process to be also easy to cause the dangerous situation of Explosion of on Arrester not in time.
Under normal operating voltage, the leakage current for flowing through enumerator is very little, and enumerator is failure to actuate.When spark gap passes through thunder
When electric wave, operation ripple and power-frequency overvoltage, powerful operating current passes through from the nonlinear resistance of enumerator, becomes through direct current
Change, solenoid is discharged and is inhaled enumerator and is moved once to realize measuring the device of lightning arrestor movement number of times, this is conventional keeping away
The operation principle of thunder device monitor.Adopt resistor disc pressure mostly in structure, solenoid action, enumerator shows, transparent
Bell glass, sealed rubber pad, negative and flange etc. carry out clamp sealing, and high-voltage terminal end is drawn from base plate center.
The lightning arrester monitor on-line operation time is long, and it is insensitive to easily cause rolling counters forward, and leakage current measurement is forbidden
Really the problems such as, the normal monitoring to spark gap is adversely affected.Arrester discharge counter is string in arrester ground
In loop be used for monitor lightning arrestor movement number of times and leakage current equipment, its major failure be " operation counter is failure to actuate " and
" leakage current table misregister ".
Hereinafter several situations may cause it to go wrong：
1st, mounting process is not good, after jolting in transit, enumerator it is stuck and cannot action.
2nd, sealing ring is aging, causes internal moist, water inlet, the increase of leakage current table error in reading.
3rd, after long-time hanging net operation, the valve block in table is aging.
4th, the filthy electric current on spark gap surface is flowed into and after the exterior and the interior leakage current can be caused to increase, and produces erroneous judgement, also accelerometer
The ager process of note.
Utility model content
The purpose of this utility model is to overcome the shortcomings of that prior art is present, and provides a kind of structure composition rationally, is made
With convenient and reliable, the live work that thunder-and-lightning counter action verification and leakage current calibration are carried out to lightning arrester monitor can be realized
Make, to guarantee monitor function-stable reliability, and then ensure that transformer substation arrester normally runs the counter of lightning arrester school of work
Experiment device.
The purpose of this utility model by following technical solution completing, a kind of counter of lightning arrester calibration equipment,
It mainly includes that it is 150A, 8/20 μ s impact that can export maximum amplitude for 300V, 1.2/50 μ s surge voltages ripples and maximum amplitude
The combination wave generation circuit of current wave, and the power current generation electricity of output up to 100V, 0.1mA-10mA standard power current
Road, described combination wave generation circuit mainly includes DC high voltage power supply, composite wave generating loop, the DC high voltage electricity
The charged resistance connection one of high frequency booster power in source is used for the high-voltage energy storage capacitor for charging, and passes through at high-voltage energy storage capacitor two ends
Resitstance voltage divider connects the control circuit of real-time monitoring electric capacity both end voltage value；It is attempted by the composite wave of high-voltage energy storage capacitor both sides
Generating loop is mainly composed in series by high-voltage discharging switch and resistance, inductance, and the combination wave generation circuit is connected to test item
With the two ends of Rogowsky coil series circuit, wherein described high-voltage discharging switch is controlled by described control circuit, and
Triggering high-voltage discharging switch is closed when high-voltage energy storage capacitor charges and reaches predetermined value, after control circuit stops charging electric capacity；
And surge voltage ripple is exported at test item two ends, dash current ripple is exported on Rogowsky coil；
Described power current produce circuit mainly include one as intelligent control unit single-chip microcomputer, single-chip microcomputer connection
One input 50Hz power frequency components, output can obtain the frequency-variable module of up to 100V power-frequency voltages, be connected by the frequency-variable module
In the two ends of lightning arrester monitor, and the adjustable power-frequency voltage of amplitude for producing is added in test loop.
As preferred：The two ends of described test item connect institute by being used to measure the condenser divider of surge voltage value
The control circuit stated, described control circuit is mainly made up of the single-chip microcomputer that can process voltage signal, and described single-chip microcomputer is single
Solely arrange or the single-chip microcomputer for constituting intelligent control unit, a high precision peak is connected on the Rogowsky coil
After holding circuit, reconnect A/D module and measure with after data acquisition, corresponding digital signal is supplied to into connected control
Circuit is further controlled and shown；
Current Negative Three-Point Capacitance link is added in described test loop, i.e., electric current is received by connection one in test loop and is born
The comparison circuit of feedback signal is connected to single-chip microcomputer and carries out the comparison of institute's plus signal, and constitutes a closed control circuit；The change
Frequency module by an input be connected with one can export the D/A modular converters of 50hz sinusoidal signals, output voltage amplitude 200V or so,
The power amplification circuit of current amplitude 2mA or so power frequency component, and described taking shelter from the thunder is connected to by described power amplification circuit
On device enumerator.
This utility model has structure composition rationally, easy to use and reliable, and the scene of realizing is carried out to lightning arrester monitor
Thunder-and-lightning counter action verification and the work of leakage current calibration, to guarantee monitor function-stable reliability, and then ensure power transformation
The features such as spark gap of standing normally runs work.
Description of the drawings
Fig. 1 is the circuit theory diagrams of combination wave generating device described in the utility model.
Fig. 2 is power frequency component generating meanss schematic diagram described in the utility model.
Fig. 3 is that power current generating meanss described in the utility model realize circuit block diagram.
Specific embodiment
This utility model is described in detail below in conjunction with accompanying drawing：Shown in Fig. 1-3, one kind described in the utility model
Counter of lightning arrester calibration equipment, it mainly includes exporting maximum amplitude for 300V, 1.2/50 μ s surge voltages ripples and maximum
Amplitude is 150A, the combination wave generation circuit of 8/20 μ s dash current ripples, and exports up to 100V, 0.1mA-10mA standard power frequency
The power current of electric current produces circuit.
Shown in Fig. 1, described combination wave generation circuit mainly includes DC high voltage power supply 1, composite wave generating loop 2,
The charged resistance R1 connections one of high frequency booster power 3 of the DC high voltage power supply 1 are used for the high-voltage energy storage capacitor C for charging,
Connect the control circuit of real-time monitoring electric capacity both end voltage value by resitstance voltage divider 4 at high-voltage energy storage capacitor C two ends；It is attempted by
The composite wave generating loop 2 of high-voltage energy storage capacitor C both sides is main by high-voltage discharging switch K and resistance R2, R3, R4, inductance L strings
Joint group is into the combination wave generation circuit 2 is connected to the two ends of test item R and Rogowsky coil X series circuits, wherein described
High-voltage discharging switch K be controlled by described control circuit 5, and when high-voltage energy storage capacitor C charges and reaches predetermined value, control electricity
High-voltage discharging switch K closures are triggered after stopping charging electric capacity in road；And surge voltage ripple 6 is exported at test item R two ends, in Luo Ge
Dash current ripple 7 is exported on Paderewski coil X；
Fig. 2, shown in 3, described power current produce circuit mainly include one as intelligent control unit single-chip microcomputer 8,
The connection of single-chip microcomputer 8 one is input into 50Hz power frequency components, output and can obtain the frequency-variable module 9 of up to 100V power-frequency voltages, by institute
The two ends that frequency-variable module 9 is connected to lightning arrester monitor are stated, and the adjustable power-frequency voltage of amplitude for producing is added into test loop 10
In.
Shown in figure, the two ends of described test item R measure the condenser divider connection of surge voltage value by being used for
Described control circuit 5, described control circuit 5 is mainly made up of the single-chip microcomputer that can process voltage signal, described single-chip microcomputer
It is to be separately provided or the single-chip microcomputer 8 for constituting intelligent control unit, connection one is high-precision on the Rogowsky coil X
After degree peak holding circuit, reconnect A/D module and measure with after data acquisition, corresponding digital signal is supplied to connected
Control circuit 5 further controlled and shown；
Current Negative Three-Point Capacitance link is added in described test loop 10, i.e., electricity is received by connection one in test loop 10
The comparison circuit 11 of stream negative-feedback signal is connected to single-chip microcomputer 8 carries out the comparison of institute's plus signal, and constitutes a closed control circuit；
The frequency-variable module 9 is connected with one and can export the D/A modular converters 12, output voltage amplitude of 50hz sinusoidal signals by an input
The power amplification circuit 13 of 200V or so, current amplitude 2mA or so power frequency component, and connected by described power amplification circuit 13
On described counter of lightning arrester 14, so as to realize that power current occurs.
Embodiment：A kind of Portable arrester monitor calibration equipment, it needs the two big functional modules realized：Composite wave
(voltage wave of 1.2/50 μ s, the current wave of 8/20 μ s) circuit occurs and power current (0.1mA-10mA) produces circuit.Combination
Wave generation circuit adopts existing portable tester circuit realiration, to produce the surge voltage signal more than 100V, reaches and keeps away
Lower limit operation voltage in thunder device enumerator national standard (JB 2440-91).Power current device adds D/A cores using single-chip microcomputer
Piece, the mode that hardware and software is combined is produced.By programming, control single chip computer produces rational signal, changes through D/A,
Reach the purpose for producing sine wave.
Shown in Fig. 1, the design principle of surge voltage generating meanss is：Tried according to GB/T 17626.5-1999 electromagnetic compatibilities
The regulation with e measurement technology surge (impact) immunity experiment is tested, open-circuit voltage waveform, the signal of short circuit current waveform can be produced
Generator is referred to as composite wave surging signal generator (CWG) or combination wave generator.
Composite wave signal required for produce test verification, combination wave generation circuit ultimate principle such as Fig. 1 institutes of development
Show, the combination wave circuit mainly includes the portions such as DC high voltage power supply, composite wave generating loop, measurement part and interface microcontroller
Point.The charged resistance R1 of high frequency booster power to high-voltage energy storage capacitor C charges, and control circuit is by the resistance at electric capacity C two ends point
The magnitude of voltage at depressor real-time monitoring electric capacity two ends, when charging reaches predetermined value, control circuit stops charging electric capacity, subsequently touches
Send out high-voltage discharging switch closure, through composite wave generating loop export maximum amplitude for 300V 1.2/50 μ s surge voltages ripples and
Maximum amplitude is the dash current ripple of the 8/20 μ s of 150A, and waveform parameter meets the requirement of GB GB 18802.1-2002.It is logical
The surge voltage value at condenser divider measurement test product two ends is crossed, high-amplitude threshold voltage can be born by single-chip microcomputer is linearly divided to
Voltage range.The dash current signal of test product is flow through by Rogowsky coil measurement, current signal is converted to into monolithic
Machine easy to handle voltage signal.The output surge voltage signal of potentiometer and Luo-coil first passes through high precision peak and keeps electricity
Road, is then measured and data acquisition by A/D module, is supplied to control circuit to carry out further corresponding digital signal
Control and display.Whole instrument, as intelligent control unit, is intelligently controlled using 8051 single-chip microcomputers using C language programming realization
The functions such as system, data acquisition, storage and display.
Fig. 2, shown in 3, the principle of power current generating meanss described in the utility model is：Stable power current produces electricity
Road principle is produced using existing frequency-variable module (input 50Hz power frequency components, output can obtain the up to power-frequency voltage of 100V)
The adjustable power-frequency voltage of one amplitude of life, is added in lightning arrester monitor two ends, and by control single chip computer the little letter of 50Hz power frequencies is exported
Number amplitude come reach control frequency-variable module output voltage, and then control test loop electric current purpose.In order to test back
The purpose of stable current value (current values of many gears from 0.1mA to 10mA) is obtained in road, needs to be added in test loop
Current Negative Three-Point Capacitance link, feedback signal is compared with single-chip microcomputer institute plus signal, reaches closed loop control single-chip microcomputer sine wave output
The effect of amplitude, and then the purpose of final steady testing loop current value.
Portable arrester COUNTER CHECK device, can produce the 1.2/50 μ s surge voltage ripples that maximum amplitude is 6kV (negative
When carrying side and opening a way), maximum amplitude be the composite wave of dash current ripple when short circuit (load-side) of the 8/20 μ s of 3kA, realize to keeping away
The action frequency verification of thunder device enumerator.The device can produce the standard power frequency that opening voltage is not less than the 0.1mA-10mA of 100V
Electric current, with the electric current for verifying counter of lightning arrester accuracy is indicated.
The convenient monitoring and test to spark gap of this utility model, is easy to the operation and maintenance of daily grid equipment, it is ensured that
The reliability of spark gap, improves protective value of the spark gap to all kinds of overvoltage, substantially reduces all kinds of overvoltage to grid equipment
The impact of safe and stable operation.Power failure can be reduced and equipment is damaged because of overvoltage, with preferable economic benefit and society
Benefit.
Claims (2)
1. a kind of counter of lightning arrester calibration equipment, it mainly includes exporting maximum amplitude for 300V, 1.2/50 s impact electricity
Pressure ripple and maximum amplitude are 150A, the combination wave generation circuit of 8/20 s dash current ripples, and export up to 100V, 0.1mA-
The power current of 10mA standard power currents produces circuit, it is characterised in that described combination wave generation circuit mainly includes direct current
High-voltage power supply, composite wave generating loop, the charged resistance R1 connections one of high frequency booster power of the DC high voltage power supply
For the high-voltage energy storage capacitor C for charging, real-time monitoring electric capacity two ends are connected by resitstance voltage divider at high-voltage energy storage capacitor C two ends
The control circuit of magnitude of voltage；Be attempted by the composite wave generating loop of high-voltage energy storage capacitor C both sides mainly by high-voltage discharging switch with
And resistance, inductance are composed in series, the combination wave generation circuit is connected to the two of test item and Rogowsky coil series circuit
End, wherein described high-voltage discharging switch is controlled by described control circuit, and reaches predetermined value in high-voltage energy storage capacitor C chargings
When, control circuit stop to electric capacity charge after trigger high-voltage discharging switch closure；And surge voltage ripple is exported at test item two ends,
Dash current ripple is exported on Rogowsky coil；
Described power current produce circuit mainly include one as intelligent control unit single-chip microcomputer, single-chip microcomputer connection one is defeated
Enter 50Hz power frequency components, output can obtain the frequency-variable module of up to 100V power-frequency voltages, is connected to by the frequency-variable module and kept away
The two ends of thunder device monitor, and the adjustable power-frequency voltage of amplitude for producing is added in test loop.
2. counter of lightning arrester calibration equipment according to claim 1, it is characterised in that the two ends of described test item lead to
The control circuit described for measuring the condenser divider connection of surge voltage value is crossed, described control circuit is mainly by energy
The single-chip microcomputer of reason voltage signal is constituted, and described single-chip microcomputer is to be separately provided or the monolithic for constituting intelligent control unit
Machine, after a high precision peak holding circuit is connected on the Rogowsky coil, reconnects A/D module and measures sum
After according to collection, it is supplied to connected control circuit further to be controlled and shown corresponding digital signal；
Current Negative Three-Point Capacitance link is added in described test loop, i.e., Current Negative Three-Point Capacitance is received by connection one in test loop
The comparison circuit of signal is connected to single-chip microcomputer and carries out the comparison of institute's plus signal, and constitutes a closed control circuit；The frequency conversion mould
Block is connected with one and can export the D/A modular converters of 50hz sinusoidal signals, output voltage amplitude 200V or so, electric current by an input
The power amplification circuit of amplitude 2mA or so power frequency component, and described spark gap meter is connected to by described power amplification circuit
On number device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621121660.6U CN206114884U (en) | 2016-10-14 | 2016-10-14 | Arrester counter calibration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621121660.6U CN206114884U (en) | 2016-10-14 | 2016-10-14 | Arrester counter calibration equipment |
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| Publication Number | Publication Date |
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| CN206114884U true CN206114884U (en) | 2017-04-19 |
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| CN201621121660.6U Active CN206114884U (en) | 2016-10-14 | 2016-10-14 | Arrester counter calibration equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646307A (en) * | 2016-10-14 | 2017-05-10 | 国家电网公司 | Lightning arrester counter calibration device |
| CN108318760A (en) * | 2018-01-26 | 2018-07-24 | 苏州工业园区海沃科技有限公司 | Dynamic current equalizing pilot system based on multigroup zinc oxide in DC converter station |
| CN111458543A (en) * | 2020-04-17 | 2020-07-28 | 华北电力大学（保定） | PCB board level test combined wave generator controlled by mercury switch |
-
2016
- 2016-10-14 CN CN201621121660.6U patent/CN206114884U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646307A (en) * | 2016-10-14 | 2017-05-10 | 国家电网公司 | Lightning arrester counter calibration device |
| CN108318760A (en) * | 2018-01-26 | 2018-07-24 | 苏州工业园区海沃科技有限公司 | Dynamic current equalizing pilot system based on multigroup zinc oxide in DC converter station |
| CN111458543A (en) * | 2020-04-17 | 2020-07-28 | 华北电力大学（保定） | PCB board level test combined wave generator controlled by mercury switch |
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